Quote Originally Posted by Opie Yutts
Thanks for dropping by.

Perhaps you could help me on the 2 types of fog though. How often are you planning on running the nozzles? It kinda seems like they would wash down the roots, thus defeating the purpose of the dry fog. I would expect no real improvement in the amount of fine root hairs you would normally get with dry fog, and I thought wet fogs produced roughly the same results as spraying. The whole point of fogging is to produce 5 micron droplets so that the roots get loads of air with their food and drink.

Also my understanding about misting and pumps is that for a true mist (something like 50 micron droplets) you'll need a 1000 psi, not 150. That and clogging is why I gave it up.

I'm new to fog research, so please correct me where I'm wrong.
Just realized I did not cover this all.
The reason for two systems is redundancy. High value crop, why take chances? Either system will keep plants going, so if one system goes tits up, no panic.
I've seen, in person, demonstrations of both sytems before. The original Frapa fogger was designed in Isreal (where I saw It) and was later made under parternship with Canadian plastics mfg. It's a true 5micron or less fog.
Ain't cheap.
Mister Nozzle's like Bete, produce "some" sub-5 micron, but the majority of the fog or mist is 5-50 micron. Natural fog is said to be abt 30 (your micron's my vary)

You said it above Opie: The fine delicate roots love oxygenated moisture (and even co2) but there are also larger/longer tap roots that like drinking water. Figure give them a drink of wet fog.

As to clogs, first if you use a pond fogger, change the transducers right away. Second be very carefull with what you use.(no olivia's!)
I'm pushing things with the nozzles I'm using, orifice is just .012. Key here is good filtration before pump...I'm using a 5 micron sediment filter. BTW, these brass nozzle's are probably overkill, they cost 13.50 each in a lot of 36. I'm using 8per tray, 16per fogfognugen, and I will be building two. Also, I'll be running very light nutrient solutions, abt 20% and I plan to utilize more foliar feeding (for various reasons).

The proposed schedule is Frapa fogger 10 mins on (@10min after the hour and 1/2 hr) every 30 mins. 24 hrs a day, don't want roots to dry out during dark period, even if they are not feeding.
Mister nozzles 3-5 seconds every half hour(on the hour and 1/2 hr) on photocell=only when lights are on. Photocell in cycle timer syncs with other timer, when lights come on.

So for example start at 7:00pm lights come on, first event is mister pump for 3-5sec. !0 mins later Frapa starts, runs 10mins and stops. 7:30 mister pump, 10 mins later etc etc.

Here's a place with various size foggers, maybe give you some ideas. Those small size room humidifer's are not too expensive and could hold promise. Plus they have pond foggers up the wazoo. Mainland Mart factory outlet and wholesale supplier